Change the visual appearance of panel on GTK per new UI design.

chrome/browser/ui/gtk/titlebar_throb_animation.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/ui/gtk/titlebar_throb_animation.h"
+#include "grit/theme_resources.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/skbitmap_operations.h"
+
+namespace {
+
+// We don't bother to clean up these or the pixbufs they contain when we exit.
+std::vector<GdkPixbuf*>* g_throbber_frames = NULL;
+std::vector<GdkPixbuf*>* g_throbber_waiting_frames = NULL;
+
+// Load |resource_id| from the ResourceBundle and split it into a series of
+// square GdkPixbufs that get stored in |frames|.
+void MakeThrobberFrames(int resource_id, std::vector<GdkPixbuf*>* frames) {
+  ui::ResourceBundle &rb = ui::ResourceBundle::GetSharedInstance();
+  SkBitmap* frame_strip = rb.GetBitmapNamed(resource_id);
+
+  // Each frame of the animation is a square, so we use the height as the
+  // frame size.
+  int frame_size = frame_strip->height();
+  size_t num_frames = frame_strip->width() / frame_size;
+
+  // Make a separate GdkPixbuf for each frame of the animation.
+  for (size_t i = 0; i < num_frames; ++i) {
+    SkBitmap frame = SkBitmapOperations::CreateTiledBitmap(*frame_strip,
+        i * frame_size, 0, frame_size, frame_size);
+    frames->push_back(gfx::GdkPixbufFromSkBitmap(frame));
+  }
+}
+
+}  // namespace
+
+// TODO(tc): Handle anti-clockwise spinning when waiting for a connection.
+
+TitlebarThrobAnimation::TitlebarThrobAnimation()
+    : current_frame_(0),
+      current_waiting_frame_(0) {
+}
+
+GdkPixbuf* TitlebarThrobAnimation::GetNextFrame(bool is_waiting) {
+  InitFrames();
+  if (is_waiting) {
+    return (*g_throbber_waiting_frames)[current_waiting_frame_++ %
+        g_throbber_waiting_frames->size()];
+  } else {
+    return (*g_throbber_frames)[current_frame_++ % g_throbber_frames->size()];
+  }
+}
+
+void TitlebarThrobAnimation::Reset() {
+  current_frame_ = 0;
+  current_waiting_frame_ = 0;
+}
+
+// static
+void TitlebarThrobAnimation::InitFrames() {
+  if (g_throbber_frames)
+    return;
+
+  // We load the light version of the throbber since it'll be in the titlebar.
+  g_throbber_frames = new std::vector<GdkPixbuf*>;
+  MakeThrobberFrames(IDR_THROBBER_LIGHT, g_throbber_frames);
+
+  g_throbber_waiting_frames = new std::vector<GdkPixbuf*>;
+  MakeThrobberFrames(IDR_THROBBER_WAITING_LIGHT, g_throbber_waiting_frames);
+}